BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

PDT Partners, LLC's Holding History (CIK: 0001564702)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 2,348 Value ($000) $413 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 2,348 Value ($000) $329 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 31,664 Value ($000) $3,977 Avg Close $124.60 Range $110.04 - $137.32

Q4 2024

Shares 39,405 Value ($000) $6,026 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 16,497 Value ($000) $3,198 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 6,500 Value ($000) $1,507 Avg Close $217.32 Range $189.44 - $237.54

Q4 2023

Shares 6,125 Value ($000) $1,585 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 1,600 Value ($000) $411 Avg Close $267.47 Range $251.85 - $287.60

Q1 2023

Shares 3,039 Value ($000) $845 Avg Close $276.70 Range $254.80 - $295.90

Q3 2022

Shares 1,175 Value ($000) $314 Avg Close $212.38 Range $193.65 - $283.44

Q1 2022

Shares 6,544 Value ($000) $1,378 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 2,447 Value ($000) $587 Avg Close $257.12 Range $221.72 - $290.76

Q3 2020

Shares 27,513 Value ($000) $7,805 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 27,515 Value ($000) $7,362 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 34,622 Value ($000) $10,954 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 32,121 Value ($000) $9,531 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 42,500 Value ($000) $9,895 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 42,500 Value ($000) $9,939 Avg Close $230.90 Range $219.20 - $245.35

Q2 2018

Shares 39,800 Value ($000) $11,552 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 39,800 Value ($000) $10,898 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 55,300 Value ($000) $17,617 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 42,700 Value ($000) $13,370 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 49,100 Value ($000) $13,324 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 29,500 Value ($000) $8,066 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 24,100 Value ($000) $6,834 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 38,200 Value ($000) $11,958 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 28,200 Value ($000) $6,819 Avg Close $263.54 Range $223.02 - $292.69

Q3 2015

Shares 57,546 Value ($000) $16,792 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 57,865 Value ($000) $23,374 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 53,235 Value ($000) $22,478 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 2,830 Value ($000) $961 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 81,541 Value ($000) $26,975 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 1,730 Value ($000) $545 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 10,634 Value ($000) $3,253 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 1,930 Value ($000) $540 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 1,730 Value ($000) $417 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 28,332 Value ($000) $6,097 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	2,348	$413	$163.37	$138.00 - $185.17
Q3 2025	2,348	$329	$135.17	$121.05 - $150.28
Q2 2025	31,664	$3,977	$124.60	$110.04 - $137.32
Q4 2024	39,405	$6,026	$168.67	$145.07 - $195.00
Q3 2024	16,497	$3,198	$209.21	$188.78 - $238.00
Q2 2024	6,500	$1,507	$217.32	$189.44 - $237.54
Q4 2023	6,125	$1,585	$245.62	$220.86 - $269.43
Q3 2023	1,600	$411	$267.47	$251.85 - $287.60
Q1 2023	3,039	$845	$276.70	$254.80 - $295.90
Q3 2022	1,175	$314	$212.38	$193.65 - $283.44
Q1 2022	6,544	$1,378	$217.46	$192.67 - $249.00
Q4 2021	2,447	$587	$257.12	$221.72 - $290.76
Q3 2020	27,513	$7,805	$278.91	$261.87 - $312.00
Q2 2020	27,515	$7,362	$300.59	$257.60 - $350.24
Q1 2020	34,622	$10,954	$303.47	$262.25 - $374.99
Q4 2019	32,121	$9,531	$277.46	$219.70 - $318.00
Q3 2019	42,500	$9,895	$232.85	$215.78 - $246.99
Q2 2019	42,500	$9,939	$230.90	$219.20 - $245.35
Q2 2018	39,800	$11,552	$281.15	$249.17 - $310.91
Q1 2018	39,800	$10,898	$310.41	$259.76 - $370.57
Q4 2017	55,300	$17,617	$320.80	$301.81 - $348.84
Q3 2017	42,700	$13,370	$296.11	$269.50 - $330.00
Q2 2017	49,100	$13,324	$264.42	$244.28 - $291.90
Q1 2017	29,500	$8,066	$282.75	$260.50 - $301.42
Q4 2016	24,100	$6,834	$296.43	$268.00 - $329.83
Q3 2016	38,200	$11,958	$296.18	$240.07 - $333.65
Q2 2016	28,200	$6,819	$263.54	$223.02 - $292.69
Q3 2015	57,546	$16,792	$330.23	$265.00 - $412.24
Q2 2015	57,865	$23,374	$401.33	$368.88 - $432.88
Q1 2015	53,235	$22,478	$394.14	$334.40 - $480.18
Q4 2014	2,830	$961	$323.51	$290.85 - $361.93
Q3 2014	81,541	$26,975	$329.72	$298.31 - $349.00
Q2 2014	1,730	$545	$300.97	$272.02 - $322.25
Q1 2014	10,634	$3,253	$317.43	$270.62 - $358.89
Q4 2013	1,930	$540	$258.65	$221.07 - $298.82
Q3 2013	1,730	$417	$223.81	$203.55 - $248.95
Q2 2013	28,332	$6,097	$213.68	$191.80 - $242.64